Automatic stopping connection for hydraulic elevators.



T. LARSSON. I AUTOMATIC STOPPING CONNECTION FOB HYDRAULIC ELEVATORS;

APPLICATION FILED JULY s. 1904. nnxnwnn nov. 14, 1908.

924,798. Patented June 15,1909.

2 SHEETS-BREE! 1.

T. LARS$0N.

AUTOMATIC STOPPING CONNECTION FOR HYDRAULIC ELEVATORS.

APPLICATION FILED JULY 5, 1904. RENEWED NOV. 14, 1908.

924,798, Patented June 15, 1909.

2 SHEETS-SHEET Z.

. Irv/611(1)- wd'rresses 1710x5502. 6 15/5 4x 01 17 UNITED STATES PATEN T OFFICE.

'lHURE LARSSON, or WORCESTER, MASSACHUSETTS, AssIeNon TO HIMSELF, FRED A. JONES, or WORCESTER, MASSACHUSETTS, AND WILLIAM E. D. STOKES, on NEW YORK, N. Y.

AUTOMATIC STOPPING-CONNECTION FORHYDRA ULIC ELEVATORS Specification of Letters Patent.

Patented June 15, 1909,

7 Application filed July 5,. 190*, Serial No. 215,266. Renewed November 14, 1908.- .Serial No. 462,619.

To all whom it may concern:

Be it known that I, THURE LaRssoN, a sub ject of the'King of Sweden, residing at lVorcester, in the county of Worcesterand State of Massachusetts, haveinvented new. and useful Automatic Stopping Connections for Hydraulic. Elevators, of which the following is a specification.

This invention relates to an elevator stopplug device which has been designed for slowing down and gradually bringing an elevator car to rest" at the ends of its run.

The especial object of this invention is to provide a safety stopping apparatus for elevator cars, which is controlled by one or more running controlling ropes connected at their ends to the elevator car,'or other mov'-' ing part, and'which run on pulleys or sheaves when the car is in motion.

To this end, this inventio'n consists of a safety stopping apparatus ftir elevators and.

of the combinations of parts therewith as hereinafter described and more particularlypointed out in the claims at the end of th s specification. I y

In the accompanying two sheets of drawings, Figure l is a front view partially broken away of a hydraulic elevator combined with a safety stopping apparatus constructed according to my. invention, and Fig. 2 is a similar view of a modified form of construction.

One essential requisite in order toinsure the safe operation of elevators is the provision of some reliable, means for bringing the clef.

vator car to rest. at the ends of its 11111. In connection with freight elevators or other comparatively "slow moving cars the requirements for automatically stopping the carat the ends'of its run are fairly well fulfilled by providing stops orabutments upon the con-.

trolling ropes with which the car is brought;

into contact as it approaches the end of its travel. In the use of lugh'speed long-run elevators, however, stopping connections which aredirectly engaged and actuated byi the elevator cars'cannot be. used to advan tage, as it is essential to provide for the.

should becomemore and more positive until the elevator motor is completely stopped when the' car reaches the desired point. I

have provided an elevator stopping apparatus which enables me to secure this operation a simple and direct arrangement of run ning controlling ropes,'so that I secure a reliable automatic control of an elevator car, this result being obtained without relying upon the engagement of the elevator car with any fixed stops, cams, ropes, or otherdevices which have. heretofore been relied upon to secure the stopping action.

,Referring] to the accompanying drawing for adetail description of, an apparatus embodying my invention, I have illustrated my construction combined witha direc t'plunger hydraulic' elevator. A hydraulic elevator of thisclass, as illustrated in Figfil, comprises .2111 elevator car A, its plunger Btaud cylinder C. Opening into the upper end-of the cylinder C is a to-aiid-from pipe D having a controlling valve E which connects the toand-from pipe 1) either with the supply pipe S or the outlet pipe F. The controlling valve E is designed to be operated from the elevator car by any of the ordinary forms of controlling ropes, or other connections which are not herein shown or (lGSCIlbQCl.

The parts thusffar referred to correspond with parts ordinarily employed in all direct acting plunger elevalorplants. the elevator motor of such a plant comprises thecylinder and the plunger ivhich movesup and down therein, I v p .Tostoptheelevatorcar atthe ends of its run, as illustrated in Fig. 1, I employ two shut-oftvalves located in the supply pipe and'theoutlct pipe respectively]. The shutoff valve located in the supply pipe comprises a valve-casing 10, and a valve-stem 11. which is connected to an operating lever 12.- Two pistons are preferably employed on the valve-stem 11 in order that the shut-off valve may be balanced so far as the water pressure is concerned. To operate the shutoff valve in the supply pipe S I employ a running controlling rope 13 which has one end seloo 4Q approaches the upperlend of itsrun, and as 5 very} gradually, and as, th'ejoperating end 70f 65 may employ a shutoff valve inithe to-andwas on thelevetfl fiz p over a pulley 1 6 at the upper end a elevator well, and thence to an eye-b0 p"'nt ;o f attachment] 17 at the op os'ite'sidefoisthe elevator car, 5 from" the p11 eye 1 5f a11d "16,,around{which the rope passes? hat,,islto say,-th'e operativeend of the running controlling -rope 1S connected tojthe elevator car or other mov-' ing part with a point of attachment'which is car vgoes up, the; running v controlling;

ropes v will move with the car, and as" the operative end of the runnin'g controlling rope 21 moves away from the pulley 351the m e willbeslackened, permitting the;

shut-o valveinthe "outlet pipe F tohbe,

" opened, so that'when theelevator car is near, the'middle of its'run,-:botlrthe-shut-ofl valves will be opened. fiAs-the elevator car'- the operativ e end of the running controlling rope 13 approaches the pulley "16,.th'e rum ning controlling rope 13;, will begin rto betaken up, so that when the] car reaches'posr' tion shown by dotted lines, the shut-off valve v in the inlet pipe will becl'osed. Inthe operationpf thisa'utomatic top-i ping"device;fori=a hydraulic elevator-,1 it ,w1ll

SQQnhthQt-j thesstopp'ing action commences either one'iofthel controlling ropesis brought I nearer to the 'p'u'lley'to which the rope runs, v thekrope willybe taken up more ;,and-more: f rapidly, untilfith'e controllinglilevers of :the stop-yalves, will be moved toshutjdown the flow of water through H the ?corresponding stop valveiwith such accuracy nd po'sitive-* ness of movement as to insure} car :being brought to rest without jar,gand he same point in its travel, no matter lflwith "Whatspeed the carmay have beenru inirig In some cases, instead of employing two running controlling ropes, and a separate stop valve for the inlet and outlet pipes, I

ling'valveE from starting the elevator in the opposite direction after it had been I brought torest provided some means are not devised for, permitting the elevator to be "started slowly in'the desired direction. I-100 accomplish this by providing a small bypass or pipe 36 connecting the controlling'valve Ewith the. cylinder. This by-pass'will permitisufiicient Water to be admittedor/e'xhausted from thecylinder to start the'ele-v105 v'ator car ingthe desired direction by the manipulation of'the controlling valve. In,- this" construction, however, the car could only we started away vfrom the end of its run comparatively slowly, and the operation of the 110 'sliut-ofi device will only slow down the'car,

.and would not bring the same to absolute rest-without a further manipulation of the controlling valve E to stop the flow of water through the bypass 36. For these reasons, 11.5 l? prefer to employ s'hut-ofl valves in both; i the supply pipe and the exhaust pipefand to controlthesame by two separate running from pipe, and control the same by a single running controlling rope.- 'Aconstruction of i this character is illustrated in the second "sheet of drawings, in which'the elevator car A,theEpisto1i B, cylinder C, and controlling- 5 correspond with parts designated by "he same letters in Sheet'lL ,Located in the to-and-from pipe D is a shut ofi valvecomprising, as 1n the construction before. de-- Olltlwflf line with the pulleys 15' an'd 16 'lhe scribed, 'a valveecasing 27 and valve-stem 28 shut-ofi' valve inthe outlet pipe'F c nnected to a weighted operatin lever 29. the same construction as the valv 3 running controlling rope 8O tor'operatsupply pipe. As 1 illustrated, it am I i'ngft-he shut-oil valve is connected at one end the v; ve-ca ng'i 1 8 and the valve-stem l9 to anzeye-bolt 31at the fartherside of the 15 com c t 'itsjupperfendtoithe operating elevator car, passes down. around a pulley leve -I20; I The shut-off :valve in the 'outlet s asms-11d a pulley 33 on the operating lever pipe-F iSpperatedby a running controlling 29,1ip' over a pulley 34 at the upperend of rOpe'QLy'Yh" his-connected toan'eye-bolt 22' the elevator well, and thence to an eye-bolt in the upper o'fthe car, passes up over "or point of attachment 35 also at the oppo- 20 a pulley 23,-under a pti'lleyfzllol'ithe consite side of the elevator car. In this con- 35 trolling lever 20, ove may 25,, and thence ,struction" the running controlling rope is tofau eye-bolt or poi'n 'attachment-ZG at taken up by both of its ends. 'lhatis to fth'e'fopposite side .0 felje vr or carf-from gsay,iwhen'tl1eend is carriedhp-near to ,;,;the pulleys 23.,and;24.i"fln theoperationioffq thepulley 34 at the upper end of the run,

25 a' hydraiflic'lelevatorasithus equippedfwhen' fthe shut-oil valvewill be closed, as well as the elevator car is near, the lower end of its when the elevator car approaches the; bottom run, as illustratedin' 'Figi 1,' thefi'shut-ofi ofitsr'un. "Inaconstructi'on, however, Where valve the inlet pipefS"w1ll be opened thQIShIlt-Ofi' 'valve is located in the'to andand the shut-ofiyal've in "the outlet pipe from pipe, the action of the shut-off valve.

30 F will be closed W'hen the" elevator :would prevent the operation of the controlcontrolling ropes. p

I a1 aware that other. changes may "be 1 made l J whoare skilled in the art without departing. fromthe scope. thereof as expressed in theclaims. ited to'theconstructions I have lherein shown v n pract1cing my invention by "those I do not wish, therefore, to be lini-v .and described, but p What I do claim and; desire to secure by Letters Patent of the United States lS:--.Z.

1. In combination with anelevator-car and :a stop'mechanism thereforyoi a rope I gradually actuate said stop mechanism.

' 3. In combination with an elevator-car and a stop mechanism therefor, of means for actuating said stop mechanism, a pair of running ropes for actuating said means, and means for causing a deflection of one or the other of said ropes as the car approaches the end of its run.

4. In combinatlon with an elevator-car and a stop mechanism therefor, of means for actuating said stop mechanism, a pair of ropes connected to run with the elevatorcar for actuating said means, and means for causing a deflection of one or the other of said ropesas the car ,approaches'the end of its run. 5. In combination with -an' elevator-car and a stop mechanism therefor, of a pair of ropes connected to travel with the car and means for causing a deflection of each of said ropes to actuate said stop mechanism.

6. In a construction of the class described, the combination of an elevator motor, a part movedthereby, means for stopping the mo: tor, and a running controlling rope passing over pulleys at the top and bottom of the elevator well, and having its end connected to the moving partwith a point of attachment therewith out of line with said top and bottom pulleys.

' ply and 7. In a construction of the class described, the'combination of an elevator car, a cylinder, a plunger movable therein to operate the car a controlling valve, a shut-off valve, v

and a running controlling rope operating the shut-off valve and passing over pulleys at the top and bottom of the elevator well, and having .its end connected to the car with its point of attachment therewith out of line with said top and bottom pulleys.

8. In an apparatus of the class described,

the combination of an elevator car, 2, cyl-- inder, a piston movable in the cylinder and operating the car, supply and exhaust pipes for the cylinder, shutoff valves located in said supply and exhaust pipes respectively,

and a running controlling rope operatingeach of said shut-01f valves.

9. In an apparatus of the class described,

the combination of an elevator car, a cylfinder, a plunger'movable therein to operate the car, supply and exhaust'pip'es for the cylinder, shut-01f valves located in the supexhaust pipes respectively, .a run-' ning controlling rope for each of said valves passlng over pulleys at the top and bottom of the elevator well, one end of each of said controlling ropes being connected with the elevator car with a point of attachment out of line with said pulleys.

In testimony whereof I have hereunto set my hand, inthe presence of two subscribing witnesses.

I THURE LARSSON.

Witnesses i I "LoUIs SOUTHGATE, ANGIE M. GODDARD. 

